Help: Where is the boundary between industrial pipelines and long-distance pipelines within the site? Boundary zone? ? ?
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Industrial pipelines within the station generally do not require intermediate valve chambers; haha, I’m still trying to determine the specific division points...
After exiting, it’s GA; where is the boundary between GA and GC?
Your concept is incorrect; you have confused the classification between GA-type pipes and GC-type pipes. In GA-class pipelines, all stations, valve rooms, and pipelines fall under the GA category. GC-class pipelines are merely pipelines owned by enterprises internally; this is not easy to understand. For example, a chemical plant falls under GC-class pipelines. Station facilities and pipelines used for urban gas supply fall under the GB category. Therefore, do not classify the stations in long-distance pipelines as GC category; classify the pipelines as GA category! !
There is no clear distinction between the pipelines within the station and those for long-distance transmission; generally, the area located within the station’s perimeter walls, up to the insulating joints, belongs to the pipelines within the station.